You can set the 'permissive guardrails". I've implemented it as part of my command line app. https://github.com/scouzi1966/maclocal-api There is a prompt that triggers it almost all he time that I used to test Doc for permissive guardrails is here (search for it): https://developer.apple.com/documentation/foundationmodels/improving-the-safety-of-generative-model-output

Tried the workaround in https://developer.apple.com/forums/thread/794839?answerId=852047022#852047022 Seems to work. Don't put any hyphens (1) in your adapter names

Answering my own question. It seems that there were some issues now fixed judging by the release notes of the latest Beta 26. It appears to be better now.

Try formatting your input text in specific way like for example json or csv and instruct the model to only work on one column. Provide 1 or 2 example as part of the prompt. Experiment with #playground. You can test this with any smaller model on ollama to get the hang of it.